Install an 1100 W Internal DC Power Supply
The ExtremeSwitching X690 and X870 series switches accommodate one or two Summit 1100 W power
supply units (PSUs) with either front-to-back or back-to-front airflow.
Note
You cannot combine power supplies of diîš‚erent wattages in the same switch.
To install a Summit 1100 DC power supply, refer to the following sections as needed:
1. Make sure you have the tools and materials you need.
See Required Tools and Materials for Installing an 1100 W DC Power Supply on page 245.
2. Prepare the power cables and ground cable by attaching the provided connection lugs to the cables.
See Preparing the Cables for an 1100 W DC Power Supply on page 245.
3. Insert the power supply into the switch.
See Installing an 1100 W DC Power Supply on page 246.
4. Connect the ground wire.
See Connecting the Ground Wire to an 1100 W DC Power Supply on page 247.
5. Connect the power supply to the electrical source and energize the DC circuit.
See Connecting an 1100 W DC Power Supply to the Source Voltage on page 248.
Required Tools and Materials for Installing an 1100 W DC Power Supply
You need the following tools and materials to install or remove an 1100 W DC power supply.
• Three copper cables, between #10 and #24 AWG, for grounding the power supply and connecting
the power supply to the DC power source. (DC power and grounding cables are not included with
the power supply.) Recommended insulation colors are:
◦ Red for the –48 V connection (–)
◦ Black for the –48 V RTN connection (+)
â—¦ Green or green with yellow stripe for the ground connection
• Connection hardware appropriate to the installation site:
â—¦ Hardware for connecting the power wires to the DC source
â—¦ Hardware for connecting the ground wire to the site grounding point
• Stripping tool
• #2 Phillips screwdriver
• Torque screwdriver and wrench or torque driver with attachments for tightening screws and nuts
• ESD-preventive wrist strap
• Thermal protective gloves (required for removal of a power supply)
Preparing the Cables for an 1100 W DC Power Supply
You need three cable wires: two power input cables and one ground cable. Refer to Required Tools and
Materials for Installing an 1100 W DC Power Supply on page 245 for details.
To prepare the cable wires for the 1100 W DC power supply unit, follow these steps:
1. Strip 0.4 inch (10 mm) of insulation from one end of each cable wire.
Installing Your Extreme Networks Switch
Install an 1100 W Internal DC Power Supply
ExtremeSwitching Hardware Installation Guide 245
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